remcos | 99a11f085f087ed16112cda26f1eb660801e83502fe0d7cf7d6f2e0b163855b6

General

Target

172473828466b4d9f0ebb306e13dad9106234d8415d3746f3618cff65e0c606334980e8e77797.dat-decoded.exe
Size

483KB
MD5

38e6f445a4cd8ff659aed076d167038a
SHA1

963fb45fb3531877dccf2a31bccc5d0cbd480445
SHA256

99a11f085f087ed16112cda26f1eb660801e83502fe0d7cf7d6f2e0b163855b6
SHA512

216cdfb939b6e6647affcb04aa298b24dc5cd5df4b931e5f5ee24bda3789dda7441d4b2ceaec6a04eb13d4e94b0ff6aa3349763eadef2119d8a149fb9ac240ac
SSDEEP

6144:QTz+c6KHYBhDc1RGJdv//NkUn+N5Bkf/0TELRvIZPjbsAOZZBAXccrwT4:QTlrYw1RUh3NFn+N5WfIQIjbs/ZBjT4

Score

10^/10

remcos aug collection credential_access discovery rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

AUG

C2

64.188.18.85:4455

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
xlorers.exe
copy_folder
xlorers
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-R2Z38E
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

Detected Nirsoft tools 9 IoCs

Free utilities often used by attackers which can steal passwords, product keys, etc.

resource	yara_rule
behavioral2/memory/1524-8-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/1524-10-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/4944-20-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4944-21-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4944-24-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/1524-14-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/1812-9-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/1812-7-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/1812-26-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/1524-8-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/1524-10-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/1524-14-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/1812-9-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/1812-7-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/1812-26-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-656926755-4116854191-210765258-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	172473828466b4d9f0ebb306e13dad9106234d8415d3746f3618cff65e0c606334980e8e77797.dat-decoded.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 3852 set thread context of 1812	3852	172473828466b4d9f0ebb306e13dad9106234d8415d3746f3618cff65e0c606334980e8e77797.dat-decoded.exe	88
PID 3852 set thread context of 1524	3852	172473828466b4d9f0ebb306e13dad9106234d8415d3746f3618cff65e0c606334980e8e77797.dat-decoded.exe	89
PID 3852 set thread context of 4944	3852	172473828466b4d9f0ebb306e13dad9106234d8415d3746f3618cff65e0c606334980e8e77797.dat-decoded.exe	90

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	172473828466b4d9f0ebb306e13dad9106234d8415d3746f3618cff65e0c606334980e8e77797.dat-decoded.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	172473828466b4d9f0ebb306e13dad9106234d8415d3746f3618cff65e0c606334980e8e77797.dat-decoded.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	172473828466b4d9f0ebb306e13dad9106234d8415d3746f3618cff65e0c606334980e8e77797.dat-decoded.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	172473828466b4d9f0ebb306e13dad9106234d8415d3746f3618cff65e0c606334980e8e77797.dat-decoded.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1812	172473828466b4d9f0ebb306e13dad9106234d8415d3746f3618cff65e0c606334980e8e77797.dat-decoded.exe
1812	172473828466b4d9f0ebb306e13dad9106234d8415d3746f3618cff65e0c606334980e8e77797.dat-decoded.exe
4944	172473828466b4d9f0ebb306e13dad9106234d8415d3746f3618cff65e0c606334980e8e77797.dat-decoded.exe
4944	172473828466b4d9f0ebb306e13dad9106234d8415d3746f3618cff65e0c606334980e8e77797.dat-decoded.exe
1812	172473828466b4d9f0ebb306e13dad9106234d8415d3746f3618cff65e0c606334980e8e77797.dat-decoded.exe
1812	172473828466b4d9f0ebb306e13dad9106234d8415d3746f3618cff65e0c606334980e8e77797.dat-decoded.exe

Suspicious behavior: MapViewOfSection 3 IoCs

pid	Process
3852	172473828466b4d9f0ebb306e13dad9106234d8415d3746f3618cff65e0c606334980e8e77797.dat-decoded.exe
3852	172473828466b4d9f0ebb306e13dad9106234d8415d3746f3618cff65e0c606334980e8e77797.dat-decoded.exe
3852	172473828466b4d9f0ebb306e13dad9106234d8415d3746f3618cff65e0c606334980e8e77797.dat-decoded.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4944	172473828466b4d9f0ebb306e13dad9106234d8415d3746f3618cff65e0c606334980e8e77797.dat-decoded.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3852 wrote to memory of 1812	3852	172473828466b4d9f0ebb306e13dad9106234d8415d3746f3618cff65e0c606334980e8e77797.dat-decoded.exe	88
PID 3852 wrote to memory of 1812	3852	172473828466b4d9f0ebb306e13dad9106234d8415d3746f3618cff65e0c606334980e8e77797.dat-decoded.exe	88
PID 3852 wrote to memory of 1812	3852	172473828466b4d9f0ebb306e13dad9106234d8415d3746f3618cff65e0c606334980e8e77797.dat-decoded.exe	88
PID 3852 wrote to memory of 1524	3852	172473828466b4d9f0ebb306e13dad9106234d8415d3746f3618cff65e0c606334980e8e77797.dat-decoded.exe	89
PID 3852 wrote to memory of 1524	3852	172473828466b4d9f0ebb306e13dad9106234d8415d3746f3618cff65e0c606334980e8e77797.dat-decoded.exe	89
PID 3852 wrote to memory of 1524	3852	172473828466b4d9f0ebb306e13dad9106234d8415d3746f3618cff65e0c606334980e8e77797.dat-decoded.exe	89
PID 3852 wrote to memory of 4944	3852	172473828466b4d9f0ebb306e13dad9106234d8415d3746f3618cff65e0c606334980e8e77797.dat-decoded.exe	90
PID 3852 wrote to memory of 4944	3852	172473828466b4d9f0ebb306e13dad9106234d8415d3746f3618cff65e0c606334980e8e77797.dat-decoded.exe	90
PID 3852 wrote to memory of 4944	3852	172473828466b4d9f0ebb306e13dad9106234d8415d3746f3618cff65e0c606334980e8e77797.dat-decoded.exe	90

C:\Users\Admin\AppData\Local\Temp\172473828466b4d9f0ebb306e13dad9106234d8415d3746f3618cff65e0c606334980e8e77797.dat-decoded.exe
"C:\Users\Admin\AppData\Local\Temp\172473828466b4d9f0ebb306e13dad9106234d8415d3746f3618cff65e0c606334980e8e77797.dat-decoded.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3852
- C:\Users\Admin\AppData\Local\Temp\172473828466b4d9f0ebb306e13dad9106234d8415d3746f3618cff65e0c606334980e8e77797.dat-decoded.exe
  C:\Users\Admin\AppData\Local\Temp\172473828466b4d9f0ebb306e13dad9106234d8415d3746f3618cff65e0c606334980e8e77797.dat-decoded.exe /stext "C:\Users\Admin\AppData\Local\Temp\veefsnnarepczxiidhzrftlsdwll"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:1812
- C:\Users\Admin\AppData\Local\Temp\172473828466b4d9f0ebb306e13dad9106234d8415d3746f3618cff65e0c606334980e8e77797.dat-decoded.exe
  C:\Users\Admin\AppData\Local\Temp\172473828466b4d9f0ebb306e13dad9106234d8415d3746f3618cff65e0c606334980e8e77797.dat-decoded.exe /stext "C:\Users\Admin\AppData\Local\Temp\gzkysggtfmhpclemnsllqyfbddvmrfi"
  2⤵
  - Accesses Microsoft Outlook accounts
  - System Location Discovery: System Language Discovery
  PID:1524
- C:\Users\Admin\AppData\Local\Temp\172473828466b4d9f0ebb306e13dad9106234d8415d3746f3618cff65e0c606334980e8e77797.dat-decoded.exe
  C:\Users\Admin\AppData\Local\Temp\172473828466b4d9f0ebb306e13dad9106234d8415d3746f3618cff65e0c606334980e8e77797.dat-decoded.exe /stext "C:\Users\Admin\AppData\Local\Temp\ibxityrvtuzumrsqedgmtlssmjnvsqzcrp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4944

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\veefsnnarepczxiidhzrftlsdwll

Filesize
4KB

MD5
1891919175c888ce82e9bd8a047b01ad

SHA1
502a6892a5d27ecb791ac5aa6d8586944f540453

SHA256
a6c43b4e4b8681cf0ef56c49c730fa77e34dc82db0260253a3ba75039030b9ec

SHA512
8bb940050b1abf6c27db133ed446f41e108f670f361ed5102408832ce33d9b87cd0880723441f1632292eeeb0a319c4e0fac0ea659eb55ebe1130cc3e6c776a3

Download Submit
memory/1524-14-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1524-8-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1524-10-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1524-3-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1524-6-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1812-7-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1812-5-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1812-26-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1812-9-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1812-1-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3852-29-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/3852-32-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/3852-34-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3852-33-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/3852-35-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4944-24-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4944-21-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4944-12-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4944-20-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4944-19-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download

Analysis

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